Water filtration system



FIG. 1 is a left rear perspective view of a water filtration system;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

I claim the ornamental design for a water filtration system, as shown. 